Parlec 5014TRKC Retention Knob CAT50 1-8 Thread

Product Description

The PARLEC 5014TRKC is a Style C retention knob engineered for CAT50 toolholders used in CNC machining centers. It features a 1-8 inch thread and a 60-degree angle radius, providing secure pull-stud engagement with the machine spindle drawbar. The knob diameter measures 0.904 inches, overall length is 3.31 inches, and the part includes through-coolant capability with a 0.25-inch coolant hole diameter. Weighing 0.545 pounds, this retention knob is built for reliable, repeatable tool changes in high-production machining environments. Installation is performed by qualified machine tool technicians or CNC setup personnel.

This retention knob is suited for CAT50 tooling applications in vertical and horizontal machining centers where through-coolant delivery is required. The 1-8 thread matches standard CAT50 toolholder specifications, making it a direct-fit pull stud for compatible spindle systems. The 1.026-inch pilot diameter and 0.667-inch neck diameter are sized to maintain concentricity and consistent pull force at the spindle interface. Facilities running high-pressure coolant through the spindle will benefit from the 0.25-inch through-coolant bore.

Key Features

• CAT50 taper size for use with standard CAT50 toolholders
• 1-8 inch thread for direct engagement with compatible drawbars
• 60-degree angle radius for proper spindle pull-stud seating
• Through-coolant capable with 0.25-inch coolant hole diameter
• Style C knob design with 0.904-inch knob diameter
• Overall length of 3.31 inches with 1.77-inch knob-to-flange dimension

Compatibility

Designed as an OEM-style replacement or service pull stud for CAT50 toolholders requiring a 1-8 inch thread retention knob with through-coolant capability.

Installation Notes

Installation should be performed by a qualified CNC machinist or tool crib technician with the machine powered down and the spindle fully de-energized. The retention knob should be threaded into the toolholder by hand first, then torqued using a retention knob wrench to the toolholder manufacturer's specification. Inspect the thread engagement and coolant bore alignment before returning the toolholder to service. Do not use impact tools, as they can damage the thread or distort the knob geometry.